LA County UHF narrow?
- Thread starter AM909
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Are you referring to LA County Fire, Sheriff??? What LA County you referring to?
ecps92
Member
Only a true insider will know if the T-Band channels went narrowband on an agency by agency basis
Altho UHF was required as was UHF-T, as the dates got closer T-Band was exempted
yet many agencies had already obtained $$ to touch each radio, others decided to wait it out.
So, the answer is YMMV but for programming a Scanner, see what sounds best for your ears.
Altho UHF was required as was UHF-T, as the dates got closer T-Band was exempted
yet many agencies had already obtained $$ to touch each radio, others decided to wait it out.
So, the answer is YMMV but for programming a Scanner, see what sounds best for your ears.
Next week I can measure the deviation of several LASD transmissions and tell if they are wide or narrow band.
It can be difficult to measure, either with a service monitor or by ear, for a couple of reasons. One is that many of the SCC dispatchers just don't speak up. I see peak deviation of less than 1 kHz from some of them. Hard to tell if 1 kHz is 40% of 2.5 kHz or 20% of 5 kHz (or 25% of 4 kHz). 
The mobiles can be better, but it can take a while to find traffic on channels that repeat them or be close enough to hear them on the dispatch input. We know the numbered dispatch and L-TACs are all narrow – it's more about the other TACs, parks, TSB, tunnels, MA, custody, etc.
The mobiles can be better, but it can take a while to find traffic on channels that repeat them or be close enough to hear them on the dispatch input. We know the numbered dispatch and L-TACs are all narrow – it's more about the other TACs, parks, TSB, tunnels, MA, custody, etc.
Yes I know it can take awhile and I would monitor both base and mobile to determine deviation. Too bad an LASD friend of mine retired, I could have measured his radio with my service monitor or possibly pulled the code plug to see how its programmed.
It can be difficult to measure, either with a service monitor or by ear, for a couple of reasons. One is that many of the SCC dispatchers just don't speak up. I see peak deviation of less than 1 kHz from some of them. Hard to tell if 1 kHz is 40% of 2.5 kHz or 20% of 5 kHz (or 25% of 4 kHz).
I could be wrong, but I believe the department switched out all the dispatch, l-tac, a-tac repeaters a couple years ago and also switched all those frequencies to narrowband.
It won't matter soon anyways, the whole department will be on the trunked system soon enough.
It won't matter soon anyways, the whole department will be on the trunked system soon enough.
Engine104
Member since 2005
Right, and a lot will be encrypted, including L-Tacs and A-Tacs
lenk911
Member
Regarding: " It can be difficult to measure, either with a service monitor or by ear, for a couple of reasons. One is that many of the SCC dispatchers just don't speak up. I see peak deviation of less than 1 kHz from some of them. Hard to tell if 1 kHz is 40% of 2.5 kHz or 20% of 5 kHz (or 25% of 4 kHz)."
Cant you just measure the deviation of the tone/code during voices pauses? 0.7-1 KHZ = wide band and 1/2 that narrowband?
Cant you just measure the deviation of the tone/code during voices pauses? 0.7-1 KHZ = wide band and 1/2 that narrowband?
No tone encode on the base stations.
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